Pipe fitting injection mold capable of automatically cutting materials

Abstract

The utility model relates to the technical field of injection molds, and discloses a pipe fitting injection mold capable of automatically cutting, which comprises a movable mold unit and a fixed mold unit, the movable mold unit and the fixed mold unit can slide relatively and can form a cavity when the mold is closed, the movable mold unit comprises a movable mold, and a mold foot is arranged below the movable mold; the mold foot is provided with a step surface; an upper ejector plate group and a lower ejector plate group are respectively arranged above and below the step surface; reset rods are arranged on the upper ejector plate group and the lower ejector plate group, so that the upper ejector plate group and the lower ejector plate group move up and down; a plurality of cutters are arranged on the lower ejector plate group; the cutting knife movably penetrates to the top surface of the movable mold from the lower ejector plate group; and a knife edge of the cutting knife is positioned at a cut-in position of a cavity needing to be cut. An integral part formed by injection molding can be directly cut in the mold before demolding, and manual secondary shearing after demolding is not needed, so that the product forming efficiency is improved; and the shape of the cutting edge is matched with that of a to-be-cut opening, so that the forming quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mould technical field, concretely relates to a pipe fitting injection mould of automatic cutting material. BACKGROUND

[0002] Injection mould is a kind of tool for producing plastic products, generally injection mould is composed of two parts of movable mould and fixed mould, and movable mould and fixed mould close to form flow channel system and the cavity of plastic product when injection molding. When injection molding, the mould is clamped on injection molding machine, and molten plastic is injected into the cavity and cooled in the cavity to form, at the same time, molten plastic is also cooled in flow channel system to form flow channel system solid, after the plastic product is formed, movable mould and fixed mould are separated, and the plastic product is ejected from the mold cavity by ejecting system to leave the mould, and finally movable mould and fixed mould are closed again for the next injection molding, and the whole injection molding process is carried out in cycles.

[0003] The existing injection mould of sewer cleaning port has the problems in the using process, in order to improve production efficiency and the utilization rate of mould, the mould can injection molding multiple products at a time, in order to facilitate injection molding, the cavity is integral, so that the formed product after injection molding is the whole connected with multiple products, and there is a sprue between the products, and secondary process is needed after demolding, the sprue is cut off by artificial shearing, and the independent product is formed, which affects production efficiency, and the quality of single product forming cannot be guaranteed due to the influence of artificial shearing technical ability. UTILITY MODEL CONTENT

[0004] The utility model intends to provide a pipe fitting injection mould of automatic cutting material, which can realize shearing in the mould before product demolding, directly form multiple independent products by once demolding, does not need artificial shearing operation, improves production efficiency and ensures forming quality.

[0005] The basic scheme provided by the utility model is as follows: a pipe fitting injection mould of automatic cutting material, which comprises movable mould unit and fixed mould unit capable of relatively sliding and forming a cavity when the mould is closed, the movable mould unit comprises a movable mould, and a mould foot is further arranged below the movable mould;The mould foot has a stepped surface;An upper ejector plate set and a lower ejector plate set are arranged above and below the stepped surface respectively, and reset rods are arranged on the upper ejector plate set and the lower ejector plate set to realize the up-and-down movement of the upper ejector plate set and the lower ejector plate set;A plurality of cutting knives are arranged on the lower ejector plate set;The cutting knives are movably penetrated from the lower ejector plate set to the top surface of the movable mould, and the cutting edges of the cutting knives are opposite to the cutting-in positions of the cavity that need to be cut.

[0006] The utility model discloses a working principle and advantage lies in: the dynamic mould and the fixed mould of the injection mould are combined to form the cavity of product, and the cutting edge of cutting knife is opposite the cutting-in position of the cavity needing cutting, when injection molding, under the traction of injection molding machine, the dynamic mould and the fixed mould separate, realize opening mould, at this time, the formed product is fixed on the dynamic mould side, and multiple cutting knives are located below the formed product, and the cutting edge of cutting knife is opposite the cutting opening of the formed product, and multiple cutting openings are aligned one by one, under the movement of ejector plate group pushed by the demoulding mechanism of injection molding machine, cutting knife moves upward and cuts off the material head from the cutting opening, so that each product is independent, and the upper ejector plate group moves up by the upward movement of lower ejector plate group, and the demoulding of multiple independent products is realized.

[0007] Compared with the prior art, the whole piece of the injection mould injection molding of the scheme can realize cutting directly in the mould before demoulding, and manual secondary shearing is not needed after demoulding, the product forming efficiency is improved, the shape of the cutting edge is matched with the shape of the cutting opening, and the forming quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 The structure schematic view of the pipe fitting injection mould capable of automatically cutting of the utility model embodiment is provided;

[0009] Figure 2 The structure schematic view of the pipe fitting injection mould capable of automatically cutting of the utility model embodiment is provided; Figure 1 The A-A section view;

[0010] Figure 3 The structure schematic view of the pipe fitting injection mould capable of automatically cutting of the utility model embodiment is provided; Figure 1 ;

[0011] Figure 4 The structure schematic view of the pipe fitting injection mould capable of automatically cutting of the utility model embodiment is provided; Figure 2 ;

[0012] Figure 5 The structure schematic view of the product and cutting knife combination provided by the utility model embodiment is provided;

[0013] Figure 6 The front view of the product and cutting knife combination provided by the utility model embodiment is provided;

[0014] Figure 7The utility model discloses a product, cutting knife and the structure schematic diagram of moving mould core subcombination provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0015] The following is further explained in detail through specific embodiments:

[0016] The marks in the drawings of the specification include: fixed mould 1, moving mould 2, moving mould core 21, moving mould backing plate 22, knife groove 211, mould foot 3, step surface 31, upper ejector face plate 4, upper ejector bottom plate 41, lower ejector face plate 5, lower ejector bottom plate 51, cutting knife 6, material pulling ejector 61, knife seat 62, reset rod 7, product 8, material head 81.

[0017] The embodiment is basically as shown in the drawings: Figure 1 And Figure 2 A pipe fitting injection mold capable of automatically cutting material, comprising a fixed mould unit and a moving mould unit capable of sliding relative to each other and forming a cavity when the mould is closed, the fixed mould unit comprises a fixed mould 1, and the moving mould unit comprises a moving mould 2, and a mould foot 3 is further arranged below the moving mould 2; the mould foot 3 has a step surface 31; the step surface 31 is provided with an upper ejector plate set and a lower ejector plate set respectively above and below, and the upper ejector plate set and the lower ejector plate set are provided with reset rods 7 thereon to realize the up-and-down movement of the upper ejector plate set and the lower ejector plate set; a plurality of sets of cutting knives 6 are arranged on the lower ejector plate set; the cutting knives 6 are movably penetrated from the lower ejector plate set to the top surface of the moving mould 2, that is, to the contact surface of the moving mould 2 and the fixed mould 1 when the mould is closed, and the cutting edges of the cutting knives 6 are opposite the cutting-in positions of the cavity required to be cut, that is, after injection molding, one cutting knife 6 is opposite one end of a material head 81 of a product 8.

[0018] As shown in the drawings, Figure 5 And Figure 6 A material pulling ejector 61 is further arranged between the two sets of cutting knives, and the material pulling ejector 61 is penetrated from the upper ejector face plate to the top surface of the moving mould, and one end of the finished product contacted by the material pulling ejector 61 has a barb, which can pull the material head in the moving mould, facilitating the demoulding of the independent product.

[0019] Specifically, as shown in the drawings, Figure 1 The upper ejector plate set comprises an upper ejector face plate 4 and an upper ejector bottom plate 41 located below the upper ejector face plate 4, the bottom surface of the upper ejector plate set, that is, the upper ejector bottom plate 41, can be limited and abutted against the step surface 31, can be suspended between the moving mould and the lower ejector plate set to keep stable, and the upper and lower sides of the upper ejector plate set are spaced apart from the moving mould and the lower ejector plate set respectively.

[0020] A movable mold support plate 22 is also provided between the movable mold 2 and the mold foot 3. A reset rod 7, provided on the upper ejector plate assembly, movably extends from the upper ejector plate assembly to the top surface of the movable mold support plate 22. An ejector is internally connected to the reset rod. The upper ejector plate assembly can move upward relative to the movable mold unit, thereby ejecting the molded part via the reset rod 7 provided on the upper ejector plate assembly. The reset rod 7, provided on the lower ejector plate assembly, movably extends from the upper ejector plate assembly to the top surface of the movable mold 2. Before the upper ejector plate operates, the lower ejector plate assembly is designed to move upward relative to the movable mold unit without interfering with the upper ejector plate assembly, thereby driving the cutting blade on the upper ejector plate assembly to move upward to cut the molded part's slug 81, ensuring that each product is independent before demolding. The lower ejector plate assembly includes a lower ejector panel 5 and a lower ejector base plate 51 located below the lower ejector panel 5. A cutting blade 6 extends from the lower ejector panel 5 to the top surface of the movable mold 2.

[0021] like Figure 2 The movable mold 2 has a plurality of movable mold cores 21 and a movable mold cavity, and the fixed mold unit has a fixed mold cavity. When the mold is closed, the upper gap of the plurality of movable mold cores is placed behind the fixed mold cavity to form an injection mold cavity; Figure 4 and Figure 7 As shown, a knife groove 211 is provided at the lower portion of the movable mold core 21 , and the knife groove 211 is clearance-matched with the cutting knife 6 and is used for limiting the position of the cutting knife 6 when it moves up and down.

[0022] The plurality of movable mold cores 21 and the plurality of cutting knives 6 are arranged along the center line of the mold (the center line of the mold is Figure 1 AA). Two cutting knives 6 are set as a group and are correspondingly arranged between two movable mold cores 21. In this embodiment, the injection mold is used for one-time injection molding of four drainage pipe cleaning ports, that is, four movable mold cores 21 are set along the center line of the mold, as shown in FIG. Figure 2 As shown, from left to right, they are the first movable mold core, the second movable mold core, the third movable mold core, and the fourth movable mold core; similarly, four cutting knives 6 are provided along the centerline of the mold, with two cutting knives 6 provided between the first movable mold core and the second movable mold core, and between the third movable mold core and the fourth movable mold core. The two cutting knives 6 are aligned on both sides of the injection-molded slug 81 between the two movable mold cores, so that the four connections of the four products 7 can be cut off to form four independent products 7. One cutting knife 6 is provided for each movable mold core 21, and the knife grooves 211 on the first movable mold core and the second movable mold core are arranged oppositely, and the knife grooves 211 on the third movable mold core and the fourth movable mold core are arranged oppositely.

[0023] like Figure 5 and Figure 6As shown, the cutting knife 6 is a plate structure, the knife edge has an inclination angle, the shape of the knife edge is matched with the shape of the cut end to be cut to ensure the cutting forming effect. The two cutting knives 6 of each cutting knife 6 group are opposite to each other at the low end of the inclination and are opposite to each other at the high end of the inclination. Such a setting is matched with the shape of the cut end 81, facilitates the cutting operation, and ensures the forming quality.

[0024] As shown in the figure, Figure 2 As shown, the lower part of the cutting knife 6 has a knife seat 62, which is a cylindrical structure. The cutting knife 6 penetrates from the lower ejector plate group, specifically from the lower ejector face plate 5 to the top surface of the movable mold 2. A through hole is arranged on the penetration path to realize penetration. The through hole is arranged according to the gap cooperation with the knife seat. Since the diameter of the knife seat 62 is larger than the maximum width of the cutting knife 6, the setting of the knife seat 62 not only plays a role in fixing the cutting knife 6, but also provides a gap space on the moving path of the cutting knife 6, avoiding the friction between the cutting knife 6 and the mold, damaging the cutting knife 6 and the mold, and improving the service life of the cutting knife 6 and the mold. In the unused state, the height of the knife seat does not exceed the upper ejector plate group, that is, does not exceed the upper ejector face plate 4.

[0025] Specifically in use, as shown in the figure, Figure 1 The injection mold combination forms a movable mold unit and a fixed mold unit, and after the mold is closed, the upper part of the movable mold core enters the fixed mold cavity to form a product cavity. After injection molding, the movable mold is separated under the traction of the injection molding machine to realize mold opening, as shown in the figure, Figure 3 At this time, the formed product is fixed on the movable mold side, and a plurality of cutting knives are located below the formed product, and the cutting knife edge is aligned with the cut end to be cut one by one. When the lower ejector plate group is pushed to move by the demolding mechanism of the injection molding machine, the cutting knife moves upward to cut off the cut end from the cut end to be cut, so that each product is independent. Through the upward movement of the lower ejector plate group to push the upper ejector plate group to move upward, the demolding of multiple independent products is realized. At this time, the pulling ejector pin pulls the cut end on the movable mold.

[0026] The injection mold provided by the embodiment can realize cutting directly in the mold before demolding, without manual secondary cutting after demolding, thereby improving the product forming efficiency. The shape of the cutting knife edge is matched with the shape of the cut end to be cut, thereby ensuring the forming quality. At the same time, by reasonably setting the distance between the upper ejector plate group and the lower ejector plate group and reasonably setting the moving speed and distance of the injection molding machine, the cutting process is smooth, the forming quality is good, and the cutting knife and the mold are not interfered, thereby ensuring the service life of the mold and the cutting knife. In addition, the modification of the injection mold is in the mold, which does not affect the overall size of the original mold, and the surrounding configuration equipment does not need to be modified or replaced synchronously, thereby strictly controlling the modification cost.

[0027] The above-mentioned is only the embodiment of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail, the ordinary skilled in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply the conventional experimental means before the date, the ordinary skilled in the art can improve and implement the present scheme under the inspiration given in the present application, and some typical known structures or known methods should not become an obstacle for the ordinary skilled in the art to implement the present application. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application.

Claims

1. A pipe injection mold capable of automatic cutting, comprising a movable mold unit and a fixed mold unit that can slide relative to each other and form a cavity when the molds are closed, wherein the movable mold unit comprises a movable mold and a mold foot is provided below the movable mold; characterized in that: The mold foot has a stepped surface; an upper ejector plate group and a lower ejector plate group are respectively provided above and below the stepped surface, and a reset rod is provided on each of the upper ejector plate group and the lower ejector plate group to realize the up and down movement of the upper ejector plate group and the lower ejector plate group; a plurality of cutting knives are provided on the lower ejector plate group; the cutting knives are movable from the lower ejector plate group to the top surface of the movable mold, and the cutting edges of the cutting knives are facing the cutting position of the cavity to be cut.

2. The pipe fitting injection mold capable of automatic cutting according to claim 1, characterized in that: A material pulling ejector is also provided between the plurality of cutting knives.

3. The pipe fitting injection mold capable of automatic cutting according to claim 1, characterized in that: The lower ejector plate assembly includes a lower ejector panel and a lower ejector bottom plate located below the lower ejector panel, and the cutting knife penetrates from the lower ejector panel to the top surface of the movable mold.

4. The pipe fitting injection mold capable of automatic cutting according to claim 1, characterized in that: The movable mold is provided with a plurality of movable mold cores. When the mold is closed, the upper gap of the movable mold core is placed behind the fixed mold unit to form a cavity. The lower part of the movable mold core is provided with a knife groove, and the knife groove is matched with the gap of the cutting knife.

5. The pipe fitting injection mold capable of automatic cutting according to claim 4, characterized in that: The plurality of movable mold cores and the plurality of cutting knives are arranged along the center line of the mold.

6. The pipe fitting injection mold capable of automatic cutting according to claim 5, characterized in that: Two cutting knives are formed into a group and are correspondingly arranged between two movable mold cores, and the knife grooves of the two movable mold cores are arranged oppositely.

7. The pipe fitting injection mold capable of automatic cutting according to claim 6, characterized in that: The cutting knife is a plate-shaped structure, the blade has an inclined angle, and the inclined lower ends of the two cutting knives in each group are opposite to each other.

8. The pipe fitting injection mold capable of automatic cutting according to claim 1, characterized in that: The lower part of the cutting knife is provided with a knife seat, which is in a cylindrical structure, and the diameter of the knife seat is greater than the width of the cutting knife.

9. The pipe fitting injection mold capable of automatic cutting according to claim 8, characterized in that: When not in use, the knife seat does not exceed the upper ejector plate assembly.

Images